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“I hate not being able to use my CPAP. I recently stayed in a hotel and the AC outlet was inoperative. I had two bad days of exhaustion.”

Due to forest fires and just unreliable electricity in California and in the hotels/inns where we vacate on the coast:

I bought a Rockpal 300 watt reserve battery. I keep it plugged in 24/7 and my CPAP is plugged into it and comes on automatically when there is a power failure. It works very well.

I am sometimes not aware that we had a power failure.
My wife doesn’t know that we are having a power failure until she realizes there are no lights anywhere. Then, she informs me in the morning that my CPAPnbattery backup worked again.

The backup battery will without any CPAP adaptation work for 2 nights. I can get 3-4 nights with a special plug that uses DC. I bought a solar system that recharges the battery pack in 5-6 hours.

Now, I am looking at a more powerful system that could power my CPAP unit for days and with a more powerful storage battery and faster solar power that can recharge that battery in about 4 hours.

Good backup battery “solar generators” are great.

I recommend the Pure Sine Wave versions that advertise an ability to run
in UPS mode. You can leave them plugged into the wall to keep them charged,
while using them at below the UPS wattage limit, and Pure Sine Wave AC
inverters provide the cleanest power along with properly efficient duty cycles.

300-500 watt hour LiFePo4 units with 300 or 500 watt pure sine wave
inverters ought to run most CPAP machines for many hours, and have the
advantage of being car travel friendly.

For general home use, something bigger is handy.
I like these for their up to 1100 watt UPS functionality, 2000 watt hour
LiFePo4 battery, 2000W continuous(4000W peak) Pure Sine wave
Inverter, 100 watt Type C PD ports, 2 hour recharge time on AC power
and 500 watt 48 volt solar input rating. Runs and recharges all the small
stuff and can still keep the freezer frozen all day. It has two solid handles,
but it’s almost 50 pounds. Dad and I put ours on small dolly’s.

I’ve tested mine, boiling water with a 1500 watt portable induction cooktop
plugged into it while unplugged from AC power. No problems.

Curious how it would behave when exceeding the UPS operating limit of 1100
watts while plugged into the wall outlet, the generator shut itself down shortly
after getting the cooktop up over 1200 watts. Resetting the generator involved
turning everything off, unplugging everything, plugging the unit back in and
turning it back on. UPS mode had no problem working an 800 watt portable
coffee maker and a laptop at the same time. (Or boiling water at 1100 watts on
the variable power induction cooktop.)

Pro Tip: UPS capable Units like these with kilowatt hour and larger batteries
can also serve as VERY long running uninterruptible power supplies for home
networks, security cameras, video doorbells, etc.

https://www.amazon.com/dp/B09WVZYRHT

https://www.amazon.com/dp/B09SB4ZD9P

(Same thing, different brand names.)

I have friends that haven’t pulled the trigger yet if anyone has other options to suggest.

~Easy